In a survey looking at illness related to raw milk over a 5 year period, researchers concluded that the number of illnesses associated with raw milk has increased. Basically, it is because more people are drinking raw milk. There are now more states that allow for the sale of raw milk (currently 30).
There is a higher risk of foodborne illness from drinking raw milk. If one chooses to drink raw milk, they should know that.
Emerging Infectious Disease
http://wwwnc.cdc.gov/eid/article/21/1/14-0447_article
Volume 21, Number 1—January 2015
Dispatch
Increased Outbreaks Associated with Nonpasteurized Milk, United States, 2007–2012
Conclusions
Within this 6-year period, the number of outbreaks associated with nonpasteurized milk increased. The number of outbreaks caused by Campylobacter spp. nearly doubled. The average number of outbreaks associated with nonpasteurized milk was 4-fold higher during this 6-year period (average 13.5 outbreaks/year) than that reported in a review of outbreaks during 1993–2006 (3.3 outbreaks/year) (
4). This increase was concurrent with a decline in the number of states in which the sale of nonpasteurized milk was illegal, from 28 in 2004 to 20 in 2011 (
7–
9) and with an increase in the number of states allowing cow-share programs (from 5 in 2004 to 10 in 2008) (
8,
9). The decision to legalize the sale of nonpasteurized milk or allow limited access through cow-share programs may facilitate consumer access to nonpasteurized milk (
5). The higher number of outbreaks in states in which the sale of nonpasteurized milk is legal has been reported elsewhere (
4).
The legal status of nonpasteurized milk sales in 1 state can also lead to outbreaks in neighboring states. In a 2011 outbreak of Campylobacter spp. infections associated with nonpasteurized milk in North Carolina, where sales of this product were prohibited, milk was purchased from a buying club in South Carolina, where sales were legal. Another outbreak of Campylobacter spp. infection in 2012 implicated nonpasteurized milk from a farm in Pennsylvania, where sales are legal; cases from this outbreak were reported from Maryland, West Virginia, and New Jersey, all of which prohibit sale of raw milk (
10). All patients residing outside Pennsylvania had traveled to Pennsylvania to purchase the milk (
10).
Outbreaks associated with nonpasteurized milk continue to pose a public health challenge. Legalization of the sale of nonpasteurized milk in additional states would probably lead to more outbreaks and illnesses. This possibility is especially concerning for vulnerable populations, who are most susceptible to the pathogens commonly found in nonpasteurized milk (e.g., children, senior citizens, and persons with immune-compromising conditions). Public health officials should continue to educate legislators and consumers about the dangers associated with consuming nonpasteurized milk; additional information can be obtained at
http://www.cdc.gov/foodsafety/rawmilk/raw-milk-index.html. In addition, federal and state regulators should enforce existing regulations to prevent distribution of nonpasteurized milk.